virtio-blk-dataplane: Improve error reporting
Return an Error so that it can be propagated later. Tested-by: Stefan Hajnoczi <stefanha@redhat.com> Acked-by: Stefan Hajnoczi <stefanha@redhat.com> [AF: Rebased] Signed-off-by: Andreas Färber <afaerber@suse.de> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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06a1307379
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3ffeeef735
@ -380,8 +380,9 @@ static void start_data_plane_bh(void *opaque)
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s, QEMU_THREAD_JOINABLE);
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}
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bool virtio_blk_data_plane_create(VirtIODevice *vdev, VirtIOBlkConf *blk,
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VirtIOBlockDataPlane **dataplane)
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void virtio_blk_data_plane_create(VirtIODevice *vdev, VirtIOBlkConf *blk,
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VirtIOBlockDataPlane **dataplane,
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Error **errp)
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{
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VirtIOBlockDataPlane *s;
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int fd;
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@ -389,33 +390,35 @@ bool virtio_blk_data_plane_create(VirtIODevice *vdev, VirtIOBlkConf *blk,
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*dataplane = NULL;
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if (!blk->data_plane) {
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return true;
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return;
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}
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if (blk->scsi) {
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error_report("device is incompatible with x-data-plane, use scsi=off");
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return false;
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error_setg(errp,
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"device is incompatible with x-data-plane, use scsi=off");
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return;
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}
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if (blk->config_wce) {
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error_report("device is incompatible with x-data-plane, "
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"use config-wce=off");
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return false;
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error_setg(errp, "device is incompatible with x-data-plane, "
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"use config-wce=off");
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return;
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}
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/* If dataplane is (re-)enabled while the guest is running there could be
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* block jobs that can conflict.
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*/
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if (bdrv_in_use(blk->conf.bs)) {
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error_report("cannot start dataplane thread while device is in use");
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return false;
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error_setg(errp,
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"cannot start dataplane thread while device is in use");
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return;
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}
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fd = raw_get_aio_fd(blk->conf.bs);
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if (fd < 0) {
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error_report("drive is incompatible with x-data-plane, "
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"use format=raw,cache=none,aio=native");
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return false;
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error_setg(errp, "drive is incompatible with x-data-plane, "
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"use format=raw,cache=none,aio=native");
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return;
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}
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s = g_new0(VirtIOBlockDataPlane, 1);
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@ -427,7 +430,6 @@ bool virtio_blk_data_plane_create(VirtIODevice *vdev, VirtIOBlkConf *blk,
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bdrv_set_in_use(blk->conf.bs, 1);
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*dataplane = s;
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return true;
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}
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void virtio_blk_data_plane_destroy(VirtIOBlockDataPlane *s)
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@ -19,8 +19,9 @@
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typedef struct VirtIOBlockDataPlane VirtIOBlockDataPlane;
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bool virtio_blk_data_plane_create(VirtIODevice *vdev, VirtIOBlkConf *blk,
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VirtIOBlockDataPlane **dataplane);
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void virtio_blk_data_plane_create(VirtIODevice *vdev, VirtIOBlkConf *blk,
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VirtIOBlockDataPlane **dataplane,
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Error **errp);
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void virtio_blk_data_plane_destroy(VirtIOBlockDataPlane *s);
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void virtio_blk_data_plane_start(VirtIOBlockDataPlane *s);
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void virtio_blk_data_plane_stop(VirtIOBlockDataPlane *s);
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@ -657,6 +657,7 @@ static void virtio_blk_migration_state_changed(Notifier *notifier, void *data)
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VirtIOBlock *s = container_of(notifier, VirtIOBlock,
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migration_state_notifier);
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MigrationState *mig = data;
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Error *err = NULL;
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if (migration_in_setup(mig)) {
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if (!s->dataplane) {
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@ -671,7 +672,11 @@ static void virtio_blk_migration_state_changed(Notifier *notifier, void *data)
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}
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bdrv_drain_all(); /* complete in-flight non-dataplane requests */
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virtio_blk_data_plane_create(VIRTIO_DEVICE(s), &s->blk,
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&s->dataplane);
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&s->dataplane, &err);
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if (err != NULL) {
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error_report("%s", error_get_pretty(err));
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error_free(err);
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}
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}
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}
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#endif /* CONFIG_VIRTIO_BLK_DATA_PLANE */
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@ -681,6 +686,9 @@ static int virtio_blk_device_init(VirtIODevice *vdev)
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DeviceState *qdev = DEVICE(vdev);
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VirtIOBlock *s = VIRTIO_BLK(vdev);
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VirtIOBlkConf *blk = &(s->blk);
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#ifdef CONFIG_VIRTIO_BLK_DATA_PLANE
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Error *err = NULL;
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#endif
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static int virtio_blk_id;
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if (!blk->conf.bs) {
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@ -708,7 +716,10 @@ static int virtio_blk_device_init(VirtIODevice *vdev)
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s->vq = virtio_add_queue(vdev, 128, virtio_blk_handle_output);
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#ifdef CONFIG_VIRTIO_BLK_DATA_PLANE
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if (!virtio_blk_data_plane_create(vdev, blk, &s->dataplane)) {
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virtio_blk_data_plane_create(vdev, blk, &s->dataplane, &err);
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if (err != NULL) {
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error_report("%s", error_get_pretty(err));
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error_free(err);
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virtio_cleanup(vdev);
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return -1;
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}
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